Automatic typographic apparatus.



Gr. R. CORNWA'LL. AUTOMATIC TYPOGRAPHIG APPARATUS. TIoN FILED APR. s,1902. EBNEWED SEPT. 2s, 1914.

Patented 01311.27, 1914.

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G. R. CORNWALL'.

AUTOMATIC TYPOGRAPHIC APPARATUS. 1 APPLICATION FILED AP R. 2, 1902.EENEWED SEPT. 28, 1914.

Patented oet. 27, 1914.

15 SHEETS-S HEBT 2 /ffr 111 Arm/Mry l G. R. GORNWALL. AUTOMATICTYPOGRAPHIG APPARATUS. APPLIOATION FILED APB. z, 1902. RENEWBDSBPT. ze,1914.

1,1 15,473. Patented Oct. 27; 1914'.

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ATTOR/VEVJ APPLICATION FILED APE.

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G. R. GORNWALL.

Patented 0013.27, 1914.

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1,1 1 5,473, Patented Oct. 27, 1914.

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WITNESSES.'

G. R. CORNWALL. AUTOMATIC TYPOGRAPHIC APPARATUS. APPLICATION FILED1113.2, 1902. EENBWED SEPT. 2a, 1914.

l, l l 5,478. Patented oct. 27, 1914.

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" W/TNESS'ES ATTUHNEYJ G. R. GORNWALL. AUTOMATIC TYPOGRAPHIG APPARATUS.APPLICATION I'IL ED APR. 2, 1902. RENEWED SEPT. 28, 1914. I 1,1 1 5,478,Patented Oct. 27, 1914.

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A TTOHNEKY' G. R. RNWALL. AUTOMATIC TYPOGRAPHIG APPARATUS. .lAPPLICATION FILED APR. Z, 1902. RENEWED SEPT; 28, 19,14. v l 1,1 15,473. Patented Oct. 27, 1914.

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W/ TIVE SSE S /N VEN 70H G. R. GORNWALL.

AUTOMATIC TYPOGRAHIG APPARATUS. APPLICATION FILED APR. 2, 1902. RENEWEDSEPT. 28, 1914.

Patented Oct. 27, 1914.

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G. R. CORNWALL.

AUTOMATG TYPOGRAPHIG APPARATUS.

APPLICATION PILEED APB. 2, 1902. BENEWED SEPT. 28, 1914. I' 1,1 15,473,s Patented 001;.2'7,1914.

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AUTOMATIC TYPOGRAPHIG APPARATUS.

APPLIGATION FILED APR. 2, 1902. RENEWED SEPT. 2s, 1914.

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G. R. GORNWALL. y AU'IFOlSrIA'IIG 'I YPOGRAPHIG APPARATUS. APPILIOATIONFILED APR. 2, 1902. RENEWED SEPT. 2s, 1914.

Patented Oct. 27, 1914.

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G. R. GORNWALL. AUTOMATIC TYPOGRAPHIG APPARATUS.

APPLICATION PILPD AP11.2, 1902. RPNPWPD SEPT. 2s, 1914.

1,1 15,473. Patented 001;. 27, 1914.

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` IIIIIIIIIIIIII EnAPR. EEEEEEEEEEEEEEEE PT. 2s, 1914. 1, 1 1 5 ,473.Patented Oct.

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GEORGE R. CORNWALL, 0F

RYE, NEW YORK, AssmNoE,

JAMES G. coEEIN, TRUSTEE.

BY MESNE ASSIGNMENTS, TO

AUTOMATIC TYPOGRAPHIC APPARATUS.

Application led April 2, 1-902, Serial No. 101,020.

To all inkom it mag/cnoncern:

Be it known that I, GEORGE R. COEEWALL, a citizen of the United States,residing at Rye, in the county of Westchester and State adapted toproduce successive character impressions on a suitable surface, in suchmanner as to form justified printed lines, under the control of acontroller device or strip which governs both the selection of thecharacters and word spaces and the justlii- Other objects of theinvention will be setforth in part hereinafter and in part will beobvious herefrom. j

In my application Serial No. 73,824, filed August 30, 1901, is describeda machine fr producing on a single controller strlp a series lofcharacter representations arranged in transverse lines and correspondingto all the functions of character and space selections, etc., and alsoto the justifying operations, that `are to be performed' in the print-Iing of j ustiied lines of printed matter.

My present invention, in certain .o f its features, relates to a machinefor utilizing a controller strip produced by the machlne shown in saidapplication.

The invention consists in the novel parts, arrangements, constructions,ycombinations, and improvements herein shown and described. -Theaccompanying drawings', referred to herein and forming a part hereof,illustrate one embodiment of the invention,

the same serving in connection with the.

descriptionto explain the principles of the invention'. A

Of the drawings z--Figure l is a plan view of a vprinting apparatusembodying my invent-ion. Fig. 2 is an inverted plan view of the same.Fig. 3 is an end view of the apparatus, and Fig. 4 is a perspective viewthereof. Fig. 3a is a View illustrating a section of the tape or ribbonwhich coperates with the apparatus and governs and con-- trols itsloperation. Fig. 5 is a sectlon on the line 5 5 in Fig. 1. Fig. 6 is 'apartlal plan view of the controller strip mechanism, and the type wheelstop mechanism con- Specifcation of Letters illatent.4

Patented Oct. 27, 1914. Renewed` September 28, 1914. Serial No. 863,798.

` trolled thereby. Fig. 7 isadetail section on .the line 7, 7, in Fig.6, of the controller strip mechanism. Fig. 8 is a .partial section ofthe type wheel line 8-8 in Fig. 9. tion on the line 8a in Fig. 9. Fig. 9is a partial underside view of the parts shown in Fig. 8. Fig. 9a is adetail view of the stop lever for arresting the type wheels. Fig. 10 isa vertical section of the type wheels and their supporting means,showing also the unlocking means therefor. Fig. 10a is a detail of acarriage locking means. Fig. 11 is a partial sectional side elevation ofthe type Wheel carrier and the associated shift- .ing mechanism. v Fig.12 is a horizontal section on the line 12-12 in Fig. 13 of a momentumdevice associated with the type wheelmechanism to release the impressionmechanism on arrest of the type wheel. Fig. 13 is a vertical sectionshowing the mechanism which is controlled by arrest of the type wheel.Figs. 14 to 16 are detail views of a valve included in such mechanism. Fig. 17 is a longitudinal section of the carriage operating c linder andits controlling means. Figs. 8 and 19 are sectional views of automaticvalves for controlling the compressed air connections. Fig. 20 is asectional view at right angles to Figs. 18 and 19. Fig. 21 is a verticalsection showing the carriage mechanism and the feed controllingmechanism. Fig. 22 is a view at right angles to Fig. 21. Fig. 23 is aninverted plan of the carriage feed controlling mechanism. Figs. 24, 25and 26 are det-ail views of the ink-distributing mechanism. Fig. 27 is adiagrammatic view illustrating the course of the fluid pressure to thevarious parts of the apparatus.

The apparatus comprises controller strip receiving and feeding means;type mechanism comprising type wheels and stop mechanism therefor actingunder control of the controller strip to select the type to be printed;shift mechanism also'controlled by the controller strip devices to bringVthe proper type wheel to .operative position; carriage mechanism withline feeding means and means for moving theA platen for space feeding;impression means coperating with 'the type wheel means and the carriagemechanism to effectthe impression, and justifying devices controlled bythe selector devices to govern the carriage feed for word stopmechanism, on the Fig. 8EL is a detail sec- 1 spacing insuch -mannerasvto justify the lines. 4'

All the above-named parts are mounted on ai suitable base or frame 1,and suitable power or driving connections are made t0 drive such of thevarious parts as are not operated pneumatically. Thus a main drivingshaft 2 is driven by belt on its pulley 3 and is connected to drive thestri feeding means., the type wheel and other devices as hereinafterdescribed. Connections are also to be provided with a source ofcompressed vair, shown diagrammatically in Fig. 27, whereby air underpressure is supplied to the pneumatically controlled parts. Thepneumatic connections between the several parts yare constituted byrubber tubes, which are generallyomitted from the drawings, to enablethe other parts to be shown more clearly.

The controller strip mechanism, (Figs. 1, 6 and 7,) comprisesa fixedblock 4 provided withfaseriesof holes crpassages 5 and a movable block6, provided with a long slot or series of holes7 registering with thoseof block 4. Block 6 is mounted to slide horizontally on guides orsupports 8, and over a fixed tubular post 9 which communicates with Atheservice of compressed air. Between this post and the block 6 is a slidevalve 10 that controls access of air from tube 9 to a passage 11 in theblock 6 communicating with the opening 7 therein. A shaft 12 is mountedeccentrically by its collars 13 in bearings on the frame 1, this shaftpassing through slots in supports 8 and having looselyT mounted thereonthe sleeve 14 that carries sprocket wheels 15 by which the controllerstrip is supported and fed, and gear 16. through which said'sleeve isdriven. This sleeve 14 engages with slotted portions of movable block 6so that when the shaft 12 is turned and the sleeve is thereby caused tomove transversely, the block 6 will be moved toward or away from the xedblock 4, to press the perforated faces of said blocks together or causethem to separate. The controller strip, carried by sprocket wheels 15,passes between said perforated faces, the perforations thereofregistering with those 'in the blocks, and when the blocks are broughttogether, as above described, they close tightly on the strip andprevent leakage, while when they are separated, the strip is looseandmay be fed forward. The move- `ment of shaft 12 to effect this operationis caused by an arm 17 (see Fig. 5) on one of the collars 13, whichthrough connecting rod 18, and other connections with the type wheelmechanism hereinafter described, are brought into action when the typewheels are stopped after' having accomplished a complete revolution andgiving all the impressions represented in one transverse line ofperforations on the controller strip. Gear 'miams 16 is driven gear 19fromV a shaft 2O connected lby friction pulley 21 and belting,

with the main shaft 2, and normally held from rotation by an escapementwheel 22 engaged -by an escapement lever on rock shaft 23 which isconnected to rod 18 aforesaid, so that as the said lever is rockedthrough connections 54 it throws the block 6 vslightly vback by means ofconnections 24',

24, enough to free the controlling strip but not enough to free thegearing, and then releases the escapement and allows the sprocket wheelsto he turned through the frictional connection from the main shaft,thereby bringing a new line of perforations to registering position.Immediately thereafter the valve 10 above referred to is openedmomentarily by connections 24, 24 (Fig. 6) with the type wheelmechanism, so as to permit compressed air to pass throughtheperforations now in line.

The passages 5 in block 4 are connected by nipples and tubularconnections, with various devices for controlling the type wheel andcarriage mechanisms. Thus the first five holes are assumed to beconnected to the justifying devices, the next six and the last two holesto a special controlling mechanism controlling various specialfunctions, while the remaining holes are connected respectively to theselection stop devices for the type wheel. These passages and holes formthe selective means whereby the controller selects `the variousmechanisms and causes the same to operate to produce the typographiccomposition which the perforations therein represent. This specialcontrolling mechanism comprises a series of piston devices 25 mounted toslide in'cylinders or passages -26 in a containing block, and saidpassages have valve ports 26 which are controlled by thepistons 25acting as valves. All the pistons have rods or pins that act on aswinging frame or bail 27 connected by rod 28, arms on rock shaft 28 androd 28 with an arm on the rock shaft 29 of a stop hook or detent 29adapted to engage an arm 45 on the type wheel shaft. A spring 29 tendsto hold this detent out of the path of said arm but when any one of thepistons 25 is operated by air pressure coming through a controllingstrip perforation and a passage 5, the swinging frame 27 will operatethe hook or detent 29 to move it into the path of the arm on the typewheel shaft. The first passage 26 in this special controlling means hasno-other function and the port thereof serves only as an exhaust port,but the ports 26 of the other passages 26 are Aconnected by tubularconnections to type wheel shifting, carriage controlling andother'mechanisms for performing the various operations of the apparatushereinafter referred to other than character-selecting operations. y

` are each secured at the by a connection 38 mechanism comprises thetype wheels 30, (Figs. 5 and 10) mounted to slide vertically, on a fixedhollow arbor 3l and a stationary arbor 31 in line therewith. The typewheel shaft 32 is mounted to turn within these arbors 31, 31 and has acollar 31a of the same diameter 'as said arbors and occupying the spacebetween the ends of said arbors, so that the type wheels can slide overthis collar in passing` from one arbor to the other. Each type wheel hasa spline connection with the arbor 31 so as to hold it in a definiteangular position while on said arbor, and the type wheel shaft collaralso has a groove engaging with the spline in the type wheels to causethe type wheel, which is for the time being on the collar, to rotatetherewith. Split spring rings 33 are provided engaging with annulargrooves in the arbors and type wheels, to snap and retain the typewheels into exact longitudinal positions.

A shift frame 34, Figs. 10 and 11, has arms spanning the series of typewheels, and is connected by rods 35, 35 to one end of a rocking lever 36on a rock shaft 36, whose arm 36, Fig. 11, is connected by a rod `orlink to the rst of a series of shift pistons 37 arranged one behindanother, in a series of cylinders 38, so that the operation of any oneof the pistons will shift the type wheels. A spring 36a tends to holdthis shifting device in normal position. The cylinders are of differentlength so that the operation of each one of them will bring to theoperative position opposite the platen and impression means, acorresponding one of the type wheels. The type wheels are locked innormal and shifted positions by a locking dog or bolt 39, Fig. 10,engaging in any one of a plurality of notches in the shift frame rod 35and connected to a series of pistons 40 Working in cylinders 41 so thatadmission of air pressure to any of said cylinders will cause withdrawalof the locking bolt, against the action of a spring 40. The pistons 40proper distance apart upon a rod 40a which passes through all of thecylinders 4l so that upon pressure being admitted to any of the ducts 41the bolt 39 will be retracted. Each of the cylinders 41 is connectedthrough tubular connections 4l' to the exhaust 26 or port of one of thevalve devices or passages 26 aforesaid and the exhaust port of eachcylinder 41 is connected with a corresponding one of the shift cylinders38. From the latter cylinders exhaust connections 42 lead to theoperating cylinder of a shut-ofi' valve 42, see igs. 1, 18 and 20,adapted to cut oil" passage of air in all the holes that correspond totype wheel shift operation. Each of the pistons operated by the airpressure in its passage from the controller strip mechanism back to thesaid valve 42 operates as a valve The type wheel series of rotatablewhich prevents the passage of air to the succeeding cylinders until ithas performed its own operation. Thus the compressed air passes first toa cylinder26 operates the special controlling means heretofore referredto and opens the port therein, then passes to an unlocking cylinder4land kunlocks the shifting frame, and at the same time openscommunication to one of thel shifting cylinders 38, the air then passingto the latter and shifting the type wheels and simultaneously opening apassage to the valve 42 which then operates'to shut ofi the supplyconnection, whereupon the locking bolt 39 snaps into engagement andholds the type wheels 1n shifted position. When the wheels are to bebrought back to normal position, air 1S passed through one of the Valvedevices 25, 26 to the end cylinder 41 and unlocks the shifting frame toenable it to be restored to normal position, the exhaust port from thisunlocking cylinder being connected directly to the cylinder of theshut-ofi' valve 42 without traversing any shifting cylinder.`

The type wheel shaft 32 is rotated by engagement of special gears 43,43, Fig. 5, on said shaft and on a shaft 44 carrylng a pinion 44 engagedby a frictional gear 2 on the main driving shaft 2. Two arms 45, 46, onshaft 32 are adapted to coperate respectively with the detent hook 29above referred to and with a series of stop pins or devices 48 arrangedin circumferential order, Fig. 6. Each of these pins is provided with apiston working in a cylinder 47 whereby the pin may be advanced orretracted into or out of the path of a lug 46 on arm 46. One of thepins, the circumferential axis of which I term the starting pin, orblank pin, indicated at 48 is pressed into the path of said lug by aspring, and its cylinder 49 is controlled by connection 49 with thevalve 10 of the controller strip mechanism. The other .stop pins arenormally out of the path of the lug 46, and these cylinders areconnected respectively with the character selecting holes 5 on block 4,by tubular connections 47, so that when air passes through any of saidholes it will project a corresponding one of the stop pins into the pathof the lug 46. These character seiecting stop-pins are returned tonormal position by air passing into the front of the cylinders throughpassages 47a, from a conduit 47 leading through arm 46 and through shaft32 and connection 58 to the valve 58, see Fig. 15. The `arm 46 also hasa cam projection 50, which engages the end of a lever 5l connectedthrough rod 24 and lever 24 with the valve 10 that controls passage ofair to the controller strip mechanism. A pin 52 also on arm 46 projectsinto engaging relation with two cam lugs on a lever 53 connected by rod54 and rock-shaft 23 to the rod 18 governing the controller strip feed.

The impression mechanism comprises a ram sliding in a fixed guide (Figs.1 and 5) and, operated by toggle connection 56 with the piston'rod ofcylinders 57, 57 which are connected through the valve 58 and connection58. with the air pressure supply. Valve 58 at each semi-rotation openscommunication at 57 to one or the other cylinder 57, so as to cause thetoggle to cross the dead center and so give a full throw to the ram ateach movement of the piston rod, or at' each semi-rotation of valve 58.A spring 56 snaps and holds the toggles away from dead center positionon either side. This valve 58 is operated upon arrest of the type wheelshaft 32 by a momentum device (Fig. 12) comprising a ily wheel or weight59 loose on said shaft and connected by pm and hole connection 59 to anend of a sleeve 60 also loose on said shaft but connected thereto by apinyand inclined slot connection 60. A spring 61 serves to press thesleeve 60 against wheel 59 but on arrest of vthe shaft 32 ythe momentumof wheel 59 causes it to cmitinue to rotate against the torsional actionof 4a spring 63, and in this rotation the sleeve 60 is mo 7ed endwiseby` the inclined slot connection and a yoke-64 that engages with yagrooved collar of said sleeve, is thereby moved 'to cause an escapementlever 64 thereon to release a tooth of an escapement wheel 65 on a shaft65 connected by gears 66 with the valve 58. A friction gear 67 tends todrive this escapement. said gear being engaged by spiral gear 67 on maindriving shaft 2. VShaft 65 when released, makes a semi-rotation and isthen arrested by its escapement. During this semi-rotationA it performsthe following functions: It locks the type wheel in vexact position `forprinting, controls the impression mechanism toy eifect` the impression,then controls the 'carriage feed (see Fig. 13) operated by.a cam 128 onthe shaftv65 and mounted tof'slide on, but turn with, lapivot shaft7129, said lever being moved longitudinallyon said shaft 129 by a cam13,0 on shaft 65, so that the lever 127 is swungpartially'int-o positionbeneath the operated type wheel land is then moved endwise'on shaft 129to cause a V-shapedtooth 127 on saidlever to engage notches 131 in thetype wheel'. An arm 132 is pinned to shaft 129. and swingstherewith 'andwith lever 1- 27 and-"acts as an abutment.

Theicarrlage frame'68, Figs.` 1, 17, 21 and 22, slides on a suitableguide frame and is movedforward and back thereon by a pis-l ton 69Aworking in a cylinder 70 and connected by a piston rod 69* andconnecting links 169", 69? and' rods '69, 69 to the carriage. Ports atopposite endsl of this cylinder'lead by connections 70' to the airpressure supply and are controlled by valves 71, 71 connected by a rodto a sliding block 72, operated by a wave cam 73 on a shaft 74 which isdriven by pulley' 74 connected to frictional pulley 74" on the maindriving shaft 2, and is controlled Vby an escapement lever 75 engagingescapement'wheel 76 on shaft 74. The escapement lever 75 has a tailprojecting inthe path of carriage frame 68, so as to be struck therebywhen the carriage reaches the starting end of its travel, the consequentrelease of shaft 74, and movement of valves 71, 71', admitting air toone end of the cylinder 7 0 and opening the other end to exhaust soI asto press the carriage frame in reverse direction, the movement in suchdirection being, however, limited by the action of feed-controllingmeans. When the end of the line has been reached the controller stripmechanism sends an impulse through a'passage 5 androne of the valvedevices 25, 26, through .connection 77 to a cylinder 77 operating theescapement lever 7 5 to admit air to the other end of the carriageoperating cylinder, to eiect the return-'of the carriage. Thecarriagethen movesback' at once under this pressure to the startingposition. A connection 99 leads from the cylinder 77 back to thecylinder of a valve device 99, see Figs. 1 and 19, similar to the valvedevice 42 and controlling the passage of air through this lineperforation hole 5. The hole 5 next to the line hole is for indent oeration and the valve device 25, 26 and 1s connected therewith leads toone of the justifying cylinders hereinafter described to give a definitefeed at' the beginning of a line. The "carriage frame 68 carries thePaper rolls 78 which in conjunction with suitable guides to lead thepaper to be printed, between the impression device and the type wheels,and

suitable mechamsmindicated at 7 9 in Figs. 21 and 22 is .provided tofeed the paper fromA linetoline"v The carriage feed controllingmechanism,

Figs. 21, 22 and 23, serves to feedthe carriage, after each impression,a distance correspondlng to the space requirements of the impressedcharacter, and-1t also serves, 1n

con3nnct1on with thejustifying means, to

feed the carriage, atthe word spaces, suiiicient distances to make up a'justified line, these distances being generally' distributed overseveral or all of the Word spaces in the line. A Arack 68,Fig. 21on thecarriage frame is engaged by a gear 80' onA a shaft 80 connected bypawlidevices 81 with. a ratchet wheel 18,2 loose Aon shaft 80 and,rigidly connected with a gear 82. Another shaft 83 carries `a gear 83'gear 82,..and also carriesa ratchet wheel 84Sv 4A'sleeve 85looseolrshaft 83 haswa` segment gear portion 85and an arm 85 carrying apawl 86 which is adapted to vengage .125 engaging said 1 vthe ratchetwheel 84 and is connected (see Fig. 2:3) by a pin and slot connectionwith a lever 87 pivoted on a spring rock shaft 87a-, said lever beingoperated by a cam 88 on the shaft 65 that is released at eachnnpresslon. Another cam 89 on this shaft operates by a link, a lever 90carrying'a dog or detent 90 that normally engages the ratchet wheel 84.Cam 89 is a pivotedcam, while cam 88 acts against the spring 87 on therock shaft 87a. The segment gear 85 engages a rack bar or slide bar 91which'is adapted at one end to engage the periphery of one of a seriesof rotary stop devices or stop wheels 92. Said wheels 92 correspond tothe several type wheels and are mounted on lixed arbors and on a sleeveon the type wheel shaft (see Figs. 5, 10 and 11), similarly tothemounting of said type wheels,

,l being controlled by vertically movable frame 93v which is connectedto the lever 36 that shifts the type wheels, so that when any type wheelis brought into loperative position by the shifting frame, acorresponding stop wheel 92 will be brought opposite the stop bar 91,and as the type wheel is turned to bring a particular character to theprinting point, the s'aid stop wheel will be turned to bring a notch,tooth or step opposite the bar. 91 corresponding indepth or position tothe length of feed required for that character. The slide bar 91 alsohas a notch or shoulder 91 engaging with a stepped block 94 operated bya series of pistons 95 working in cylinders 96 which are connected bytubular connections 96 to certain of the nozzles or passages 5 in theblock 4 of the controller strip mechanism. In each of the stop wheels 92an extra deep notch is made at the point corresponding to word space,which is the point at which the type wheel system is arrested by thestop lever 29". Under these circumstances the bar 91 is .not arrested bythe stopl wheel and it moves under the influence of the carriage drivingpower (in this case the air cylinder for the carriage) until itsshoulder 91 strikes the particular step of block 94 which has been setin its path. The cylinders 96 (Fig. 21) are of di'erent length so thatthe p0- sition of lblock 94 and consequently the amount which the bar 91allows the carriage to move depends on which one of the justi fyingperforations 5 in the block 4'has.tra1ismitted air. A spring 94 steppedblock 94 to normal position as soon as the air pressure is removed.-Each of the cylinders 96 has an exhaust connection. at 96 back to thecylinder o .f valve 42 that controls all the justifying passages as wellas the shift passages, so that when any justifying portion has beenoperated it alows air pressure to pass to cylinder of valve 42 and tocut off the pressure from the justifying cylinders 96. The block 9 4will,

tends to return the fhowever, be still held in operated position byengagement of bar 91 therewith, but when the said bar is retracted theblock 94 will be returned to normal position by the spring 94.Retraction of the bar 91 after each operation is eected by the lever 87.At each printing operation the cams 88, `89, make a semi-rotation, beingreleased by :j the momentum device controlled by arrest of ,the typewheel shaft, and the levers 87, 90, are operated in succession. Duringthe latter part of the semi-rotation lever 87 moves 'in oppositedirection to arrow in Fig. 23, i hrowing'pawl 86 out of ratchet wheel 84and then when the pawl strikes a pin 85a ion the arm 85 said arm isturned so as to retract the bar 91, this movement being fiinally stoppedby a screw stop 98. 86 has two functions: It engages ratchet wheel`84and thereby connects arm 85 and g segment portion 85 with said ratchetwheel, and therethrough with the carriage driving gmeans, causing saidysegment portion 85 to move rod 91 when the carriage is fed along. Pawl86 is connected also to lever 87 by pinand-slot connection, andtherethrough to cam 88 on shaft 65, whereby when the type Wheel hasbeenarrested in position to make lan impression the carriage feedcontrol mechanism is operated as described. On the next release of cams88 89, the lever 87 passes olf the end of cam L88 and moves in thedirection of the arrow in Fig. 23 under the inuencc of its springcausing pawl 86 to again engage ratchet wheel 84 and the ratchet wheel84, whereuponthe whole system of gearing moves under the influence ofthe carriage driving air cylinder until the bar 91 is arrested either byone of the stop wheels 92 o r by the stepped justifying block 94 as thecase may be. On return movement of the carriage the pawl connection 81slips sci that this system of gearing remains staticmary.

When the type carriers are to be shifted it" is necessary to stop theshaft thereof by the hook 2,9', and thev momentum device above describedwill operate'to release the cam shaft 65 andl allow one semi-rotationthereof. As it is not desirable to allow the connection, comprising forexam le a. dog# ging bar 97 (Fig. 101)engagingt e controlling bar 91 andoperated-through a lever 98 engaged by the unlocking bar ,3c for thety'pe carrier-,shifting frame 34 so thatI when the shifting frame isunlock the feed controlling bar 91 is locked.

The peration iof the apparatus so far described is as follows: Acontroller strip of paper or other material with perforations arrangedin transverse lines on the sprocket wheels 1,5v and between the blocks4,6. and the drving-.and'iuid pressure C011- Pawl i lever 90 then movesto release dog 90 froIn carriagev to feed at such times, I providea

